1. Open the main interface of the mobile phone and click Settings to enter, as shown in the figure.
2. In the setting interface, click the Security and Privacy button to enter, as shown in the figure.
3. Find the option of "Lock screen and password" in the security and privacy interface, and click to enter, as shown in the figure.
4. Click the "Lock Screen Style" button in the screen lock and password interface, and click Enter, as shown in the figure.
5. Enter the lock screen style interface, select your favorite lock screen picture, click and check one to set it, and the setting is successful.